Wiardgroup

A few quick answers since I have to get to a gig ...

On Fri, 06 Dec 2002 02:17:01 -0000 its_peake <its_peake@yahoo.com> wrote:
> (and thanks again to Doug Pearson!)

You're always welcome!
 
> - Do the Borg filters self-oscillate
> (individually or in series?)

Yes.
 
> - Do the Borg filters process DC signals?

I have never tried this.

> What are the ranges of the Fcs?

Not sure ...
 
> - What are the frequency ranges for the LFOs on
> the Borg filter?

I don't know the numbers, but they go well up
into the audio range (although mine seem to be
calibrated to EML CV's).
 
> Are they CV or controlled solely via the
> associated Osc knobs? 
> (Guessing that the three CV ins are strictly
> for the filters.)

No, two ins are for the filter (1v/Oct, and Mod), while one is for the osc. 
The filter mod is the
only one with an associated knob, the osc cv
input is (as I mentioned above) pretty close
to 1v/oct.  I've (incorrectly) used multiples
to sum two CV's to get more modulation sources
for the osc, and it's worked well enough.
 
> - I have heard that the Envelator can be set to
> linear response via 
> a PCB jumper or setting, making for a greater
> range of available 
> overall envelope slopes (good info on this at
> Grant's DIY site). Is 
> there indeed a choice of slope that is
> configurable internally?

Not sure about this ...
 
> - The Envelator does not appear to have
> feedback wired up on 
> the Amod and Dmod input jacks, although they
> appear to be 
> interrupt types in the block diagram in the
> online manual. I'll take 
> it that this is an extremely simple mod
> (tapping off of the + 
> output) and can be possibly be added to an
> order? 

Adding new normalizations to the panel jacks
would be quite easy; there are already
exposed solder pads for this purpose.
 
> - The Start-up patch sheet indicates that on
> the Classic VCO, the 
> osc pulse output fires the S/H; is this an
> interrupting jack for 
> external clocking of the S/H so that it may be
> gated from external 
> sources? (Thanks, it appears to be so, but I
> can't make out the 
> name of the jack.)

Do you mean the noise output (which does act like a S/H at LFO frequencies,
outputting clocked
random voltages)?  No, there's no external
input for that one (is it labeled S/H on the
new panel revisions, perhaps?).

Hope this helps, and that others can fill in the
blanks I've left (or any mistakes I've made).

    -Doug
     jasret@mindspring.com